1. Automatic car: In general, it should be replaced every two years or after driving for more than 40,000-60,000 kilometers. Depending on the driving situation, if the gear of the vehicle is smooth and the noise of the gearbox changes little, it can be replaced; If the vehicle looks rough when shifting gears, the noise of the gearbox will increase obviously after the speed exceeds 100 km, which indicates that you may need to change the oil.

2. Manual transmission car: Manual transmission car has mature technology, low failure rate and strong reliability. Generally, the gearbox oil should be changed every 3 years or every 60,000-80,000 kilometers.

You can check your gearbox oil when changing the oil. Because the inspection process is complicated, you can find the service department of the dealer to handle it. In order to measure accurately, the car must be put into neutral P and run at idle speed, the car must be parked in a flat place, and the engine oil must run to the working temperature of 80℃~93℃.

4. For the gearbox, the lubricity, viscosity and oil temperature stability, especially the oil temperature of the automatic gearbox oil, when the radiator is too dirty to dissipate heat, the computer will enter the emergency operation mode after detecting the high temperature, and the gear will be forced to shift up (lock the gear, lock a specific gear), and a "dry" fuel filler door will appear, which will make the vehicle feel dragged and frustrated when driving. When the oil temperature exceeds 65438+,